projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 2004 IBM Corporation | |
| 3 | * | |
| 4 | * Authors: | |
| 5 | * Leendert van Doorn <leendert@watson.ibm.com> | |
| 6 | * Dave Safford <safford@watson.ibm.com> | |
| 7 | * Reiner Sailer <sailer@watson.ibm.com> | |
| 8 | * Kylene Hall <kjhall@us.ibm.com> | |
| 9 | * | |
| 10 | * Maintained by: <tpmdd_devel@lists.sourceforge.net> | |
| 11 | * | |
| 12 | * Device driver for TCG/TCPA TPM (trusted platform module). | |
| 13 | * Specifications at www.trustedcomputinggroup.org | |
| 14 | * | |
| 15 | * This program is free software; you can redistribute it and/or | |
| 16 | * modify it under the terms of the GNU General Public License as | |
| 17 | * published by the Free Software Foundation, version 2 of the | |
| 18 | * License. | |
| 19 | * | |
| 20 | */ | |
| 21 | #include <linux/module.h> | |
| 22 | #include <linux/version.h> | |
| 23 | #include <linux/pci.h> | |
| 24 | #include <linux/delay.h> | |
| 25 | #include <linux/fs.h> | |
| 26 | #include <linux/miscdevice.h> | |
| 27 | ||
| 3122a88a KH |
28 | enum tpm_timeout { |
| 29 | TPM_TIMEOUT = 5, /* msecs */ | |
| 30 | }; | |
| 1da177e4 LT |
31 | |
| 32 | /* TPM addresses */ | |
| 3122a88a | 33 | enum tpm_addr { |
| daacdfa6 | 34 | TPM_SUPERIO_ADDR = 0x2E, |
| 3122a88a | 35 | TPM_ADDR = 0x4E, |
| 3122a88a KH |
36 | }; |
| 37 | ||
| 6659ca2a KH |
38 | extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, |
| 39 | char *); | |
| 40 | extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, | |
| 41 | char *); | |
| 42 | extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, | |
| 43 | char *); | |
| 44 | extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, | |
| 45 | const char *, size_t); | |
| 1da177e4 LT |
46 | |
| 47 | struct tpm_chip; | |
| 48 | ||
| 49 | struct tpm_vendor_specific { | |
| 50 | u8 req_complete_mask; | |
| 51 | u8 req_complete_val; | |
| d9e5b6bf | 52 | u8 req_canceled; |
| 1da177e4 LT |
53 | u16 base; /* TPM base address */ |
| 54 | ||
| 55 | int (*recv) (struct tpm_chip *, u8 *, size_t); | |
| 56 | int (*send) (struct tpm_chip *, u8 *, size_t); | |
| 57 | void (*cancel) (struct tpm_chip *); | |
| 58 | struct miscdevice miscdev; | |
| 6659ca2a | 59 | struct attribute_group *attr_group; |
| 1da177e4 LT |
60 | }; |
| 61 | ||
| 62 | struct tpm_chip { | |
| 63 | struct pci_dev *pci_dev; /* PCI device stuff */ | |
| 64 | ||
| 65 | int dev_num; /* /dev/tpm# */ | |
| 66 | int num_opens; /* only one allowed */ | |
| 67 | int time_expired; | |
| 68 | ||
| 69 | /* Data passed to and from the tpm via the read/write calls */ | |
| 70 | u8 *data_buffer; | |
| 71 | atomic_t data_pending; | |
| 72 | struct semaphore buffer_mutex; | |
| 73 | ||
| 74 | struct timer_list user_read_timer; /* user needs to claim result */ | |
| 75 | struct semaphore tpm_mutex; /* tpm is processing */ | |
| 1da177e4 LT |
76 | |
| 77 | struct tpm_vendor_specific *vendor; | |
| 78 | ||
| 79 | struct list_head list; | |
| 80 | }; | |
| 81 | ||
| daacdfa6 | 82 | static inline int tpm_read_index(int base, int index) |
| 1da177e4 | 83 | { |
| daacdfa6 KJH |
84 | outb(index, base); |
| 85 | return inb(base+1) & 0xFF; | |
| 1da177e4 LT |
86 | } |
| 87 | ||
| daacdfa6 | 88 | static inline void tpm_write_index(int base, int index, int value) |
| 1da177e4 | 89 | { |
| daacdfa6 KJH |
90 | outb(index, base); |
| 91 | outb(value & 0xFF, base+1); | |
| 1da177e4 LT |
92 | } |
| 93 | ||
| 1da177e4 LT |
94 | extern int tpm_register_hardware(struct pci_dev *, |
| 95 | struct tpm_vendor_specific *); | |
| 96 | extern int tpm_open(struct inode *, struct file *); | |
| 97 | extern int tpm_release(struct inode *, struct file *); | |
| 98 | extern ssize_t tpm_write(struct file *, const char __user *, size_t, | |
| 99 | loff_t *); | |
| 100 | extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); | |
| 101 | extern void __devexit tpm_remove(struct pci_dev *); | |
| 4fd416c1 | 102 | extern int tpm_pm_suspend(struct pci_dev *, pm_message_t); |
| 1da177e4 | 103 | extern int tpm_pm_resume(struct pci_dev *); |